This is an E3D Titan Extruder carriage for TEVO´s Tarantula printer.
The idea is to mount the extruder on the "rear" to keep the original width of the print area.
It is designed to fit a cheap (~ 8$) and light (~150g) 17HS2408 stepper motor from Aliexpress. I use this motor to drive the Titan Extruder on my M Prime One.
Currently untested. Feedback welcome.
FreeCAD source files included.